WordPress上简单的帖子评分系统

Question

我正在创建投票后系统，允许访问者评分（从1到5）。如果用户登录，或者没有安装任何缓存插件，它工作正常。但对于激活了缓存插件的客户（WP超级缓存），它无法正常工作。

有人可以帮助我让访客用户也能使用吗？我想它需要一些Ajax / JavaScript？

<form method='POST' action="">
    <input type="hidden" name="rate" value=2>
    <input type=submit value=2>
</form>
<form method='POST' action="">
    <input type="hidden" name="rate" value=3>
    <input type=submit value=3>
</form>
<form method='POST' action="">
    <input type="hidden" name="rate" value=4>
    <input type=submit value=4>
</form>
<form method='POST' action="">
    <input type="hidden" name="rate" value=5>
    <input type=submit value=5>
</form>

<? php
if (isset($_POST['rate'])) {
    if ($_POST['rate'] == '1') {
        $rate = get_post_meta($post - > ID, 'up', true);
        $rate = $rate + 1;
        update_post_meta($post - > ID, 'up', $rate);

        $total = get_post_meta($post - > ID, 'total', true);
        $ratetotal = $total + 1;
        update_post_meta($post - > ID, 'total', $ratetotal);
    }
    if ($_POST['rate'] == '2') {
        $rate = get_post_meta($post - > ID, 'up', true);
        $rate = $rate + 2;
        update_post_meta($post - > ID, 'up', $rate);

        $total = get_post_meta($post - > ID, 'total', true);
        $ratetotal = $total + 1;
        update_post_meta($post - > ID, 'total', $ratetotal);
    }
    if ($_POST['rate'] == '3') {
        $rate = get_post_meta($post - > ID, 'up', true);
        $rate = $rate + 3;
        update_post_meta($post - > ID, 'up', $rate);

        $total = get_post_meta($post - > ID, 'total', true);
        $ratetotal = $total + 1;
        update_post_meta($post - > ID, 'total', $ratetotal);
    }
    if ($_POST['rate'] == '4') {
        $rate = get_post_meta($post - > ID, 'up', true);
        $rate = $rate + 4;
        update_post_meta($post - > ID, 'up', $rate);

        $total = get_post_meta($post - > ID, 'total', true);
        $ratetotal = $total + 1;
        update_post_meta($post - > ID, 'total', $ratetotal);
    }
    if ($_POST['rate'] == '5') {
        $rate = get_post_meta($post - > ID, 'up', true);
        $rate = $rate + 5;
        update_post_meta($post - > ID, 'up', $rate);

        $total = get_post_meta($post - > ID, 'total', true);
        $ratetotal = $total + 1;
        update_post_meta($post - > ID, 'total', $ratetotal);
    }
}

$score = get_post_meta($post - > ID, 'up', true);
$number_of_votes = get_post_meta($post - > ID, 'total', true);
$average = round($score / $number_of_votes, 1);

echo $average;;
echo ' / 5 ';
echo " - ".get_post_meta($post - > ID, 'total', true)." votes"; ?>